/**
 * ORIPA - Origami Pattern Editor
 * Copyright (C) 2013-     ORIPA OSS Project  https://github.com/oripa/oripa
 * Copyright (C) 2005-2009 Jun Mitani         http://mitani.cs.tsukuba.ac.jp/

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package oripa.domain.fold.condfac;

import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import oripa.domain.fold.halfedge.OriFace;
import oripa.domain.fold.subface.SubFace;

/**
 * @author OUCHI Koji
 *
 */
public class FaceToSubfacesFactory {
	public Map<OriFace, Set<SubFace>> create(final List<OriFace> faces, final List<SubFace> subfaces) {
		Map<OriFace, Set<SubFace>> subFacesOfEachFace = new HashMap<>();

		faces.forEach(face -> subFacesOfEachFace.put(face, new HashSet<>()));

		for (var subFace : subfaces) {
			for (var face : subFace.ParentFacesIterable()) {
				subFacesOfEachFace.get(face).add(subFace);
			}
		}

		return subFacesOfEachFace;
	}
}
